google.de is an official domain owned by Google. Of course, they're the best out there. Safe site and trusted sources for me. Be aware of the ad results. I wish there were better ways to contact the customer support/help/feedback team.

The Google Arbitrary URL Redirect Vulnerability is aiding and abetting spammers/scammers to obfuscate the landing url.
The scheme is being widely by nefarious actors. And whilst being known since 2011 Google does not nothing for the protection of users.